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1 #ifndef _LINUX_VMALLOC_H
2 #define _LINUX_VMALLOC_H
3
4 #include <linux/spinlock.h>
5 #include <asm/page.h> /* pgprot_t */
6
7 struct vm_area_struct;
8
9 /* bits in vm_struct->flags */
10 #define VM_IOREMAP 0x00000001 /* ioremap() and friends */
11 #define VM_ALLOC 0x00000002 /* vmalloc() */
12 #define VM_MAP 0x00000004 /* vmap()ed pages */
13 #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
14 #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
15 /* bits [20..32] reserved for arch specific ioremap internals */
16
17 /*
18 * Maximum alignment for ioremap() regions.
19 * Can be overriden by arch-specific value.
20 */
21 #ifndef IOREMAP_MAX_ORDER
22 #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
23 #endif
24
25 struct vm_struct {
26 void *addr;
27 unsigned long size;
28 unsigned long flags;
29 struct page **pages;
30 unsigned int nr_pages;
31 unsigned long phys_addr;
32 struct vm_struct *next;
33 };
34
35 /*
36 * Highlevel APIs for driver use
37 */
38 extern void *vmalloc(unsigned long size);
39 extern void *vmalloc_user(unsigned long size);
40 extern void *vmalloc_node(unsigned long size, int node);
41 extern void *vmalloc_exec(unsigned long size);
42 extern void *vmalloc_32(unsigned long size);
43 extern void *vmalloc_32_user(unsigned long size);
44 extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
45 extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
46 pgprot_t prot);
47 extern void vfree(void *addr);
48
49 extern void *vmap(struct page **pages, unsigned int count,
50 unsigned long flags, pgprot_t prot);
51 extern void vunmap(void *addr);
52
53 extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
54 unsigned long pgoff);
55
56 /*
57 * Lowlevel-APIs (not for driver use!)
58 */
59 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
60 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
61 unsigned long start, unsigned long end);
62 extern struct vm_struct *get_vm_area_node(unsigned long size,
63 unsigned long flags, int node);
64 extern struct vm_struct *remove_vm_area(void *addr);
65 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
66 struct page ***pages);
67 extern void unmap_vm_area(struct vm_struct *area);
68
69 /*
70 * Internals. Dont't use..
71 */
72 extern rwlock_t vmlist_lock;
73 extern struct vm_struct *vmlist;
74
75 #endif /* _LINUX_VMALLOC_H */